TY  - BOOK
AU  - Singh, S.K.  .
TI  - Gymnosperms and palaeobotany / 
SN  - 81-8030-145-1
U1  - I6 
PY  - 2008///
CY  - New Delhi : 
PB  - Campus Books International , 
KW  - Palaeobotany- Gymnosperms
ER  -